Blow-out packer



Nov. 22, 1927.

J. A. KAMMERDINER BLOW-OUT PACKER Filed Nov. 24.. 1925 77M!/ (W lag ATTORNEYS as Nov. 22, 1921,.

v v 1,650,974 PATENT OFFICE.

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BLOW-OUT PACKER.

Application filed November 24, 1926. Serial 1T0. 71,078.

This invention relates to a blow-outopre- I venter for use in drilling oil wells. Devices of this character are well known in the art.

In drilling oil wells, strata containing oil and gas under heavypressure are often sud- 'denly encountered, and when bored into, the high pressure released blows out the hole and equipment until the force is spent or the hole chokes up. A blow-out may ruin the well for deeper drilling. In the drilling of oil wells, the hole is made and the advance of te drilling tools followed by a well casin Where there is liability of encountering hig gas pressure, a head may be maintained on the top of the casin such head havlng a seat to receive a pac er which may be secured 'to the drill pipe. Thus, the packer may be seated in the head, when thought advisable, closing off the space between the drill pipe and casing. A head is provided with suitable take-ofi passages for permitting and controlling the flow of oil and gas therefrom. When a well starts blowing off, the stream of gas, oil, sand, gravel and rocks issuing therefrom, hinders the placement of the packer, and endangers those who are trying to place the packer in position.

The primary object of this invention is the provision of a packer arranged to be easily and quickly secured about the drill pipe. To this end, I have provided a split packing so that it ma be placed around the pipe, closed and loc ed in position. An-

other object of this invention is to provide.

a packer of the character described havin details of structure such that'it lends itsel to being expeditiously and quickly attached to the drill pipe, permitting those who are attaching the packer to remain at a distance and out of danger.

These objects, together with other objects and corresponding accomplishments are dbtained by means of the embodiment of my invention illustrated in. the accompanying drawing, in which:

Fig. 1 is a front elevation of a complete packer; Fig. 2 is a plan view; Fi 3 is a section as seen on the line 3-3 0 Fig. 2; Fig. 4 is a section as seen on the'line 4.4= of Fig. 1; Fig. 5 is a fragmentary side elevation showing the handle for supporting and manipulating the device with a portion of its shank broken out to make the view more compact and Fig. 6 is a fragmentary section to an enlarged scale as seen substantially on line '66 of Fig. 1.

Referring more particularly to the drawmg, 6 indicatesa conical seat to which is secured a compressible and expansible ring 7. This packing ring is preferab y made of rubber. Above the packing ring is a ipe follower 8 havin dogs or slips for grab ing the drill pipe an preventing the acker assembly from being blown up the pipe by the upward stream of gas and oil. The parts ust described are secured to one another to form an assembly unit having a bore extending therethrough for the passage of the drill pipe. However, the unit is split lon 'tudinally so that it may be 0 ned up or the entrance of the'drill pipe t ereinto.

The seat 6 comprises a body 9 having a gate 10 closing an opening therein and mounted upon a hinge pin 11 so thatwhen the gate is swung outwardly, the bore through the seat is opened for entry theremto of the drill pipe. Forming'avpart of the gate 10 and extending on the other side of the hinge pin 11 is a tongue 12 which swmgs wit the gate. It is dis osed in a suitable pocket at one side of t e bore in the seat body 9, when the gate is 'closed. When the gate is 0' en, the tongue will be disposed across the re. Packin ring 7 is conveniently made of rubber and is attached to the seat member. It is split along the line 13 as shown in Fig. 1 so that it may be opened up. However, the resiliency of the rubber is such that the packing ring requires no hinge. v

The follower ring comprises a body 14 to which a gate 15 is hinged b means of pin 11. The construction is suc that gates 10 and 15 are hinged upon the same pin. Follower 8 is secured to the packing ring 7 so that the elements of the packer may be opened as a unit. The seat 9, packing rin 7 and follower 8 may all be secured toget er by means of pins 16 extending downwardly and into each of these elements. The hin pin 11 may also be used as a member to he the parts together. For the purpose of looking the packer in closed position, I have pivotally mounted a T-headed latch 17 within a recessin the gate and referably provide a spring 18 tending to c ose the latch. A keeper notch 19 is provided in the body 14, portions of which form'teeth 19", rounded on their outer faces. When the gate is closed, the head of latch 17 will ride up over these and drop into notch 19, holding the vent it from being blown up the pipe sliding along and abutting the next upper collar, I have provided inclined ways 20 on. opposite sides of the bore in body 14, the walls of the wa s being undercut and slidably mounted 't erein are slips 21 having serrations 22 on their inner faces. The slips are rovided with abutments 25 at the1r lower en s, which limittheir travel in an upward direction, by striking the heads of screws 26. This structure is such that when the slips are in their lower position within the ways, the slips will be located with the least diametrical distance between them. In

order to provide for placing the packer about the pipe by a workman who may remain at some distance, I have provided a handle 23 which is secured in any suitable manner to the body 14. I

The acker is applied to the drill pipe in the following manner: The gate is opened exposing the bore and bringing tongue 12 across it. The packer is then supported by the slips 21, loops 24' serving for attachment to tackle. By means of the handle 23'the unit is pushed toward the drill pipe so that the latter enters the bore. .As the packer is forced against the drill pipe, tongue 12 engages the pipe and swings the gate to closed position. The latch 17 then locks the packer about the drill pipe, and the slips are then released. Lowering of the drill pipe will cause a collar thereon or clamps to move the packer downwardly, whereupon it may be seated in its head. Any tendency to blow or move the packer along the drill pipe is hindered by the slips.

What I claim is: p

1. A packer unit comprising a follower having a bin thereof, a split com ressible and expansible packing ring secure to said follower so as to i to said follower so as to be opened t erewith,

a seat secured to saidring and having a hinged gate correspondingto said first mentioned gate, a lip pro'ectmg from theljoint of said last mentioned ate so as to be disposed within the bore 0 said unit when the gate is open, and a spring latch for locking said unit closed mounted upon said follower.

3. A packer unit comprising a follower having a hinged gate foropening the bore thereof, longitudinally movable sli s for gripping the work mounted within sald fol-' secured lower, a split rubber packing rin to said fol-lower so as to be opened t erewith, a seat secured to said ring and having a hinged gate corresponding to said first mentioned gate, said last mentioned gate having a lip projecting from its joint so as to be disposed across the'bore of said unit when the gate is open, and a sprin latch for locking said unit-closed mounte upon said follower.

In witness that I claim the fore oing I have hereunto subscribed my name tfiisllth day of November, 1925.

JAMES ALLEN KAMMERDLNEB.

' gate for opening the bore 

